You have €900k worth of assets and a gold plated civil service pension.
There is no need for you to economise so long as you put the non-home assets to productive use.
This makes no sense. I full appreciate that you don't want the hassle of renting. I understand that you might not want to invest directly in shares.
But you have €500k earning you nothing - in fact, it's costing you.
Sell the buy to not let and invest all your money in a 100% equity ETF.
And if that is too much hassle, then buy an ordinary unit-linked fund.
It might be inefficient from a tax point of view, but getting 60% of a decent return is better than getting 100% of 0%.
Brendan